I found our Bugaboo carrycot was by far the biggest compared to friends travel systems. Both mine used it for six months (and could easily have gone longer except I was impatient to let them see the world!).

Another vote for Uppababy Vista - it's not the longest but you don't need tonnes of leeway at their head/feet (as long as they aren't actually touching both ends!) so they are fine in it longer than you'd imagine

Emmaljunga edge, very roomy and also designed to be safe for overnight sleeping, made to exceptionally high standards and designed to last. I love mine and it still looks immaculate and it's being used second time round.

Thanks lucky. I've now found several places saying it isnt. It must have been the vista I'm getting confused with. We couldn't decide between the two. I will just take a travel cot with us when we stay elsewhere. I'm not sure it's worth taking the risk for one extra trip to the car.